Air compressor or pump.



Attorneys.

nventor Patented Aug. 25, 1914.

2 sHBBTssBBT 1 V. J. GUTHRIE.

AIP. COMPRESSOR 0R PUMP.

APPLICATION FILED MAY16,1013.

THE NO V. J. GUTHRIE.

AIR. COMPRESSOR 0R PUMP.

AYPLICATION FILED Mule, 191s.

l,08,434. Patented Aug.25,1914

Witnesses k w V) Inventor, o? @u by Z a gz E mw). k c

' @6 Attorneys UNITED STATES PATENT OFFICE.

VENABLE J. GUTI-IRIE, OF CAMBRIA, VIRGINIA.

Specification of Letters Patent.

Patented Aug. 25, 1914.

Application filed May 16, 1913. Serial N o. 768,109.

jb all who/m, it may concern.' y

lle it known that I, Vnnami J.GU'rifm1n, a citizen ot the United States, residing atl Cambria, inthe county of Montgomery and State of Virginia, have invented a new and useitul Air Compressor or Pump, oi' which the lollowing is a specification.

The present invention appertains to` air compressors or pumps, and aims to provide a novel and` improved air compressor or pump operating to displace the fluid under `high pressure.

Another object of the present invention is to provide a compressor or pump which shall dispense with the use of the ordinary cylinder and piston, so as to eradicate the n 1 objections existing in pumps oit the cylinder and piston type. y

il ini-ther object oir the present invention isto provide a compressor er pump Dl3rating under the displacement principle, which f shall be comparatively simple, durable, and

inexpensive in construction, as well as serviceable and eilicient in its use.

.llVith the foregoing general objects outlined and with other objects in view, which `will be apparent as the nature of the invention is better understood, the present invention resides in the combination and arrangement of parts and inthe details oi construction hereinafter `described and claimed, it being understood that changes in the precise embodimentof `the invention can be made within the scope of what is claimed without departing from the spirit of the invention. y I

The invention has been illustrated in its preferred embodiments inthe accompanying drawing, wherein Figure 1 is a side elevation of thedevice. Fig. 2 is a plan view thereof, a portion being shown in section, the section. being taken on the line @m2 ot' Fig. 1. Fig. 3 is` a sectional View taken on the line 3M?)` of Fig. 2. Fig. 4- is a transverse section taken on the line 4-11 of Fig. 1.. l Fig. 5 is a side elevation, partly in section, illustrating a modification or variation. y

Referring specifically to the drawings, the compressor or pump is preferably supported on a suitable base `or bed 1, and enibodies a main chamber or compartmenet@ supported on the base 1. The chamber 2 is preferably cylindrical and has the ends or heads 3 and 3 bolted or otherwise attaclled thereto. The respective heads 3 and 3 of the chamber are provided with the outstanding conical `pockets Ll and 4: aianged vertically thereof the axes 5 of the pockets Il alining with the axis of the chamber 2.

Disposed for reciprocation within the chamber 2, is a plunger 5 of suitable diameter, the same having pointed or conical ends 6 adapted to snugly enter the respective pockets l and if, the plunger 5 being somewhat shorter than the chamber 2 so that the length of stroke will be equal `to the diil'erence in lengths of the` chamber and plunger. The chamber 2 is preferably mounted on the rear end oi? `the base 1,` and the apex of the forward end `ot the plunger 5 is provided with a stein or plunger rod 7 passing through the apex of the pocket 4l, while the apex of the rear end is provided with a tail or supplemental stem 7 passing through the apex of the pocket 4. Each of the pockets is provided with a stui'ling box 8 at its apex, a gland 9 being secured within each stul'ling box S to compress the packing disposed in the stuffing box against the respective stein or tail, `thereby effecting a tight lit. A guide 10 is mounted on the base directly iii advance or in :liront of the clia1nber 2, and a cross head 11 is slidably carried by the guide l0, the free end, ori'ather outer end, of thc stem 7 being attached to the cross head, and a pitman or` connecting rod 12 connects the cross head 11 with a crank disk 13 mounted on a shaft lil supported by a pair of pedestals i or` pillow blocks 15 carried by the base adjoining its forward end. The shaft 14 may be driven in any suitable manner, such as by means of a pulley wheel 16 keyed upon the shaft 14 between the pedestals 15, although it is to be understood that other means may be employed, and that the rotary motion oi the shaft lll maybe converted into the rectilinear or reciprocatory motion of the plunger in any well known manner. y

Each of the pockets l and l is provided with a lateral port or inlet 17, the same being normally closed by a spring pressed valve 1S, which seats outwardly against the inner end of the respective port, so that the valves may open inwardly to admit the fluid, as will hereinafter appear.

A. sleeve 19 embraces the plunger 5 and is of a length approximately equal to the plunger, omitting 'the conical ends of the plunger. ln other Words, the stroke of the sleeve 19 is similar to the stroke of the plunger 5, the ends of the sleeve 19 being beveled, as at 20, to snugly engage Within or abut against the beveled annular gaskets 21 secured to the inner face of the heads 3 andA 3. The gaskets 21 are secured to the inner faces of the respective heads around the pockets or sockets 4 and 4', and are preferably constructed of rubber, or other com-Q pressible material. The plunger 5 Worksg snugly with t-he sleeve 19, and is preferablyl provided intermediate its ends with '-thel -packing rings 5a for providing a tight fitt between the plunger and sleeve.

The chamber 2 is preferably provided With an extension or lsupplemental chamber or compartment 22 upstanding therefrom, especially when `the device is employed as a compressor, the outlet pipe 23 being preferably connected to the supplemental chamber or chest 22, although the outlet pipe may be tapped into the Vsupplemental or main chamber at any suitable point.

The sleeve 19 is operated from the driving shaft 14,-a novel gear or actuatingmechanism being provided for this purpose. To this' end, a rocking shaft 24 is journaled through the supplemental or auxiliaryA chamber 22, and has a pair of depending arms 25 attached thereto and projecting Within the@ main chamber 2 at the sides of the sleeve 19. The sides of the sleeve 19 are provided withy the upright face plates 2G lintermediate the.'` `ends of the sleeve, Wrist pins 27 projecting from the face plates 26, and the `lower or, free ends of the arms 25 being bifurcated or` forked so as to engage over the respective; `pins 27. he escillationof the shaft 24 is thus adapted to impart a reciprocatory movement to the sleeve `19, so that the sleeve Will slide upon the plunger'.

To the outerend of the rocking shaft 24` there is secured a slotted lever 29 carrying the adjustable slide 30, a block 31 beingfpivotally carried by the slide 30. A bolt 32j passes through the slot of the -lever 29 and engages the slide 30 to clamp the slide in anyadjusted position, While `the block 31V 'carries a set screvv 33.

A lever 34 is fulcrumed uponv an upright or standard 35 carried bythe base, the respective ends er arms of the lever 34 extending to the driving shaft 14 and chambers 2, respectively. A cam 36 is keyed upon the driving shaft 14, the respective arm'of the lever 34 having a Vfork 37 straddling the cam 36, rollers 33 being carried by the branches of `the fork to engage the opposite orupper and loiver portions of the cam 3G The cani 36 is so designed that when the driving shaft v14 is rotated, the 'rear -endvoi of the lever 34 Will be intermittently yraised and lowered at the respective ends of the strokes of the plunger 5. The lever34 "may be spring `pressed by means of a suitable spring 39, although this is not necessary.

A link 40 connects the rear arm of the lever 34 With the lever 29, the link 40 having its upper end reduced, as at 41, and passing through the block 31, the set screw 33 serving to bind the reduced portion 41 in any adjusted position with respect to the slide 30. Adjoining its lower end, the link 40 is provided with a longitudinal slot 42 in which a slide 43 is movable, coiled Wire compression springs being disposed between the slide 43 and the ends of the slot 42. rlhe springs 44 permit the slides 43 to yield in `either direction, for the lpurpose which will hereinafter appear.

In operation, as the shaft 14 is rotated, the plunger 5 Will lreciprocate Within the chamber V2, the conica-l ends ofthe vplunger' snugly entering @the respective pockets 4 and 4 at the ends of the strokes of the plunger. The timing ofthe sleeve actuating mechanism or gear is such, that when the plunger 5 is at one end of its stroke, the sleeve will be moved `from the other Aend of the chamber 2 to the corresponding end of the chamber to which the plunger has moved, the sleeve being held against the lrespective end of the chamber While the plunger is moved 'toward the other end. The sleeve Will'thusbe at rest against one end of the chamber 2, While the Aplunger 'is moving toward the other end, andas the plunger reachesand-commences to leave the respective end of the chamber 2, the sleeve 19 Will vbe moved quickly Vtovvard the said end of the chamberby the mechanism above described. The plunger has a 'continuous reciprocatory movement `i'vher'eas the sleeve has an intermittent reciprocatory movement, `the motion Of'the sleeve being quicker than that of the plunger, so that the sleeve may be moved from one end of the chamber 2 to the other end, vvhile the pitman orconnecting rod 12 xpasses dead center, or While the respective end of theplunger 5 enters and 'commences to leave the respective pocket. It will thus be manifestthat when the sleeve 19 is seated against one end of the chamber 2, the respective beveled-end 20 of the sleeve fits tightly Within the respective gasket 21. The stroke of the plunger toward the other end of the chamber Will cause the'fiuid Within the chamber to lbecome compressed, the plunger displacing the fluid as it moves toward the respective end of lthechamber. 'Inasmuch as the sleeve lits :tightly against the respective end of the chamber 2, and inas much as the plunger has a tight lit with the sleeve, air or other fluidv `will `be drawn through the respective inlet port 17, and after the plunger has reached'the end of the stroke, and the sleeve has left the respective gasket, the respective valve will close, and

the air will 4vthus co-'mingle With the comi pressed air or fluid withinthe chamber `2.

enA

Thus,.duringfeach stroke of the plunger, the

i respective ports. w The slide 30 is so adjusted that themotionwof thetlever 3ft will be slightlycXcessive, that isythemotion of the `lever 34j will be slightly greater in proportion than the stroke of thesleeve 19, and as a consequence, when the sleeve `is moved `against one end of the chamber 2, the respectiverspring ad ivill ubc brought under a greater compression, so as to tightly but yieldingly hold the sleeve against the respective: end oit the chamber 2 lvide a tight joint.

in a order to proidly moved tov/'ard the respective end of the brought under `sutlicient tension totightly Chold tlieen d ci the sleeve against the respec tivegasket `2l. l/Vhen the device is ein-- ployedas an air compressor, the inlet ports 1'? will communicate directly with the atmosphere and as the plunger and sleeve are reciprccated, the air within the chamber 2 "will be compressed by displacement, and in this manner, the air or 'fluid may be compressed under high `pressure with `but a m1nimum expenditure ofpmver, it being observed that the conical ends of the plunger reduces friction and permits of thedisplacenient of air Without great eli'ort. When the apparatus is employed as a pump, the inlet ports 17 are connected to any suitablesource oi' water, or other fluid, in order that when the sleeve 19 is seated against one end of the chamber2, the stroke of the plunger toward the other end,yvill draw or suck the Water or other fluid into thespace created Within the respective pocket and thesleeve, `the Water or fluid co-mingling With the fluid Within the chamber 21as the sleeve leaves the respective end of the chamber 2, and the `operation being repeated during each stroke of the plunger and sleeve. i The employment oft the device as a pump is also as eilicient as when the device is employed as an air con1- presser, the conical ends of the plunger reducing friction,` and the liuid Within the chamber 2 beingdisplaced as the respective ends of the plunger are projected from the sleeve toward the respective end of the chamber. f

From the foregoing, taken in. connection with the drawing', the advantages and capabilities of the present device will be apparent to those versed in the art, `and need not be described at length, it being noted that the objects aimed at have been carried the `chamber 2 and being jnected to a horizontal reciprocatory member To `promote this func` tion, the cam 3G, has been steppedas at 36% so that as the cam rotates, counter clockwise as seen in Fig.` l, theisleeve 19 "will be rap-` tuated by the member Sita out satisfactorily, and that the presi-intap-` paratus is an eilicient` and desirable one."

` The present apparatus susceptibleto alterations, `gone inodilication` being illus- Vtrated in I `i,`g.i"f5.` In the construction illustratedinFig.` 5, it will be observed that the supplemental or auxiliary chamber `22 is omitted, and thatthe sleeve 19` is provided Withan upstandingilug or ear 272e sleeve actuating stem or rod QL being passed slid ably through the forward end or head ci yicldingly con- 34a carried by an` upright orstandard 3V supported on the base l; The reciprocatoiy member 34a lhas a depending toi-lz or yolce 37, the branches or which straddle thecam secured to the shaft 14s,ro`llers 3S bcing carried bythe free endscf the branches "to contactwith the cam. The stein Qcai# ries a `collar 43, coiled Wire compression springs ida being mounted oii the stem or rod 25 and seating between the collar` 413e and the rcciprocatory member 34 so that thestein or rod Qvvill be yieldably acas the cani rotatcs. The forward end or head 31" of :the chamber 2fl is preferably provided witlrtlie stutlingwboxe surrounding the stein or rod @52a gland 46 beingengaged into the st|1ll'- ing boX for compressing the packing therein against the stem 25a to providca tighttt.

T ie operation of the modification de picted in Fig. 5 is similar tol that of the form above described, the construction, lnnrk ever, `being somewhat simplified. Any forni of sleeve actuating mechanism or gear may be employed with equalpropriety, the Storm illustrated in l to l, inclusive, however, `being preferable, inasmuch as it permits of certain adjustments, in, order that the sleeve may be held at a greater or less tension against the rlspective gaskets E21 unf der the various conditions under which the machine may be operated.

Summing up the cardinal or salient ifeatures of the present invention, it will be observed thatltlie `present apparatus is a comparatively simple, durable and inexpensive one; that there is eliminated the use of the ordinary cylinder and piston; that `the :tluid Within the inain chamber is compressed or otherwise discharged by the displacement caused by the reciprocation of the plunger and sleeve, which minimizes the expenditure of power, and increasesthe vcilicicncy of the device; and that the present apparatus is improved generally in its construction and utility. y

.Particular attention is directed t0 the :fact that the plunger and sleeve are oi app reivi-` mately equal length, and are each of a length over one-halt| the length oft the chant ber 2. ticularly in connection with This is otconsiderable moment, parthe terminal ii o stems of the plunger slidably engaging through the ends of the chamber, in order that the plunger will be eifectively supported for reciprocatory movements, and in order that the sleeve will be efficiently mounted for sliding movements upon 4the plunger.` Thus, the ends of the plunger will be projected from the ends of the sleeve, so as to displace the fluid within the chamber, which is highly desirable.

Although the gaskets 2l may be constructed vof rubber, they are preferably made of brass or suitable metal ground or machined to lit the beveled ends of .the sleeve, so as to withstand the wear and other conditions to which they are subjected. The cam` should also be of such design that the rollers continually engage the periphery thereofl so as to prevent any lost motion vor looseness of the sleeve actuating mechanism.

Having thus described the invention, what is claimed as new is l. The combination in a device ot the character described, of a chamber, a plunger disposed therein and having terminal stems slidable through the ends of the chamber, a sleeve slidable on the plunger and terminally abutable against the ends ot' the chamber, the plunger and sleeve being of approximately equal `length and each being of a length over one half the length of the chamber, means connected to one plunger stem for reciprocating the plunger, and means for r-eciprocating the sleeve from one end of the chamber to the other when the plunger is at the ends of its strokes, the ends of the chamber having valved inlet ports to communicate with the ends of the sleeve. 2. The combination in a device of the character described, of a chamber, a plunger disposed therein having conical ends and stems projecting from the apice-s of the said j ends, the stems being slidable throufrhthev, ends of the chamber, a sleeve slidable on; the plunger and terminally abutable Y against the ends of the chamber, the plunger and sleeve being of approximately equal length and each being of a vlengthover one halt the length of the' chamber, means connected to one plunger stem for reciprocating the plunger, and means for reciprocating the sleeve from one end of the chamber `to the other, when the plunger is at the ends of `its strokes, the ends of the chamber having conical pockets'to receive the conical ends ofthe plunger, andthe said pockets havingv valved inlet ports. l

3. The combination in a device of the character described, of a chamber, a plunger reciprocable between the ends thereof, a sleeve slidable on the plunger and terminally abutable against the ends of the chamber, the ends ofthechamber having valved ports to communicate with the ends of the sleeve, a shaft journaled for oscillation through the chamber,`anarm att-ached to the said shaft within the chamber and having its free end Voperatively connected to the sleeve, and

means connected to the outer endl of the said shaft for vintermittently oscillating it.

4. The combination in a device of the character described, of a chamber, a plunger reciprocable between the ends thereof, a sleeve slidable on-the plunger and terminally abutable against the ends of the chamber,

the ends of the chamber having valved ports to communicate with the ends of the sleeve, a shaft journaled Nfor oscillation through the chamber, an arnrattach'ed to the said shaft within the chamber and having its free end operatively connected lto the sleeve, an arm attached to the outer end of the said shaft, and actuating means adjustably connected to the last mentioned arm, and including yieldable means.

In testimony that I claim the foregoing as my own, I have hereto aiiixed my signature in the presence of twowitnesses.

VENABLE J. GUTHRIE. i lVitnesses A. lV. MILLER, WV. E. MoCoY.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

